package com.hmdp.service.impl;

import cn.hutool.core.io.resource.StringResource;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.hmdp.dto.Result;
import com.hmdp.entity.ShopType;
import com.hmdp.mapper.ShopTypeMapper;
import com.hmdp.service.IShopTypeService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.utils.RedisConstants;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.CACHE_SHOP_TTL;
import static com.hmdp.utils.RedisConstants.CACHE_TYPE_KEY;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class ShopTypeServiceImpl extends ServiceImpl<ShopTypeMapper, ShopType> implements IShopTypeService {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result findList() {
        String key = CACHE_TYPE_KEY;
        //1.查询redis获取shopType信息
        String typeListJson = stringRedisTemplate.opsForValue().get(key);
        //2、判断是否存在
        if(StrUtil.isNotBlank(typeListJson)){
            //3.存在，返回结果
            List<ShopType> shopTypes = JSONUtil.toList(typeListJson,ShopType.class);

            return Result.ok(shopTypes);
        }
        //4.redis无，查询数据库
        List<ShopType> typeLists = query().orderByAsc("sort").list();

        if(typeLists.isEmpty()){
            return Result.fail("店铺类型为空");
        }

        //5.写入到redis
        stringRedisTemplate.opsForValue().set(key,JSONUtil.toJsonStr(typeLists));
        return Result.ok(typeLists);
    }
}
